4-acetylpyridine

4-Ethyl ether is its main use, as a solvent for various medicines, and also as an anesthetic for surgical operations. According to the records of "Tiangong Kaiwu", its use is probably the same.
Fuether has good solubility, and many pharmaceutical ingredients rely on it to dissolve. In the pharmaceutical industry, ether is often used as a solvent to extract and polymerize the active ingredients of drugs, and then prepare them for preparations. This is very useful in the preparation of various medicines such as Pill Powder Pill. Taking pills as an example, if it is necessary to form some insoluble medicinal materials into pills, ether can dissolve its substance, and then combine them with other materials to make the pills uniform in texture and uniform in drug power.
And the use of ether in surgery is particularly eye-catching. Surgical procedures are designed to make patients feel pain-free so that they can be treated with surgery. As an anesthetic, ether can cause patients to become dizzy and temporarily lose their pain. During surgery, the doctor can calmly operate the knife, cut carrion, connect broken bones, and treat wounds and ulcers, while the patient does not feel pain. However, the use of ether as an anesthetic also needs to be cautious. The amount of dosage is related to the safety of the patient. Less anesthesia is insufficient, and the patient still feels pain during surgery; more risk of respiratory depression and cardiac arrest. Therefore, the doctor must be skilled in calculating the dose, and closely observe the patient's vital signs during surgery. From this perspective, the main users of 4-ether are drug solvents and surgical anesthesia, both of which play a pivotal role in the field of medicine and are related to the health of the people and the implementation of medical techniques.

The physical properties of lithium tetradeuteride are very different. This is a compound containing lithium and deuterium, and its nuclear properties are quite eye-catching.
In terms of its state, lithium tetradeuteride is mostly solid at room temperature and pressure. Its texture is relatively solid and has a certain structural stability. Looking at its color, it is usually white or nearly white, showing a quite pure appearance.
Lithium tetradeuteride has a moderate density, which is slightly lower than that of some common metals. However, its density is sufficient to maintain a stable solid state under conventional environments and is not easily deformed or flowed.
Furthermore, lithium tetradeuteride has a rather high melting point. In order to melt it from a solid state to a liquid state, a large amount of thermal energy needs to be applied. This property allows it to remain solid in a high temperature environment and has important uses in specific engineering and scientific research fields.
Its thermal conductivity is also considerable. When there is heat transfer in the outside world, lithium tetradeuteride can conduct heat relatively quickly. This property makes it an excellent heat conduction medium in applications related to heat exchange.
In addition, the crystal structure of lithium tetradeuteride is regular and orderly. The crystal structure gives it specific physical properties, which are reflected in optics, electricity and other aspects. In optics, it has unique absorption and reflection characteristics for specific wavelengths of light; in electricity, although it is not a good conductor, its electrical properties may play a unique role in the design of some special circuits or electronic devices.
Lithium tetradeuteride has unique physical properties and shows potential value and application prospects in many fields such as energy, scientific research and special material preparation.

Tetradeuterium ammonia, its properties are strange. Deuterium, the isotope of hydrogen, has a mass greater than normal hydrogen. Tetradeuterium ammonia is the hydrogen atom in ammonia that is replaced by deuterium.
In terms of its physical rationality, compared with normal ammonia, due to the large mass of deuterium, the boiling point and melting point of tetradeuterium ammonia may be different. The boiling point of normal ammonia is about -33.4 ° C, and tetradeuterium ammonia may be slightly higher, because its intermolecular force varies due to mass changes. And its density is also greater than that of normal ammonia, due to the weight of deuterium.
As for chemical properties, tetradeuterium ammonia and normal ammonia have similarities in many reactions. All can form salts with acids, such as However, because the deuterium-nitrogen bond is stronger than the hydrogen-nitrogen bond, the reaction rate of tetradeuterium ammonia may be slower than that of normal ammonia in some reactions that require bond breaking.
In organic synthesis, tetradeuterium ammonia can be used as a deuterium source to introduce deuterium atoms into compounds. Because it contains deuterium, it can provide clues for the study of reaction mechanisms. By labeling deuterium atoms, the reaction process can be traced and the atomic direction can be clarified.
In industry, although its application is not as extensive as that of normal ammonia, tetradeuterium ammonia has unique value in specific fields, such as nuclear industry and high-end scientific research. Or used to prepare special materials, study isotope effects, and help scientific exploration and technological innovation.

The synthesis method of 4-butyraldehyde is as follows:
First, it is obtained from the starting material of propylene and methylation. This is a commonly used method in engineering. In this reaction, propylene and carbon monoxide interact with each other in the presence of a specific catalyst. The catalysts used are multi-gold carbonyl compounds, such as octacarbonyl dioxides, etc. The reaction needs to be carried out under a certain degree of force, usually at 100-180 ° C, and the force is roughly 1-10 MPa. The inverse equation is as follows:
$CH_2 = CHCH_3 + CO + H_2\ xrightarrow [] {catalysis} CH_3CH (CH_3) CHO $
The effect of this method is that the source phase of the raw material propylene is extensive, and the inverse components have been matured for many years, which is beneficial to large-scale oxidation.
Second, butyraldehyde can be obtained from the oxidation of butyl alcohol. Generally, gold catalysis is used at a suitable temperature, so that the oxidation of butyl alcohol or oxygen is reversed. The inverse of the equation is:
2 dollars (CH_3) _2CHCH_2OH + O_2\ xrightarrow [] {Cu or Ag} 2 (CH_3) _2CHCHO + 2H_2O $
The operation of this method is convenient, but attention should be paid to control the degree of oxidation, so as to avoid oxidation to form byproducts such as butyric acid.
Third, with butene raw materials, butyraldehyde can also be synthesized by hydration-oxidation method. Butylene first hydrates water under the action of catalysis to generate butyl alcohol. This step of catalysis is often catalyzed by acidic lipids such as butyl. The generated butyl alcohol is then oxidized by the above oxidation steps. This method can make full use of butylene sources and also has a certain work value.
Therefore, different synthesis methods have their own characteristics. In the production process, it is necessary to choose the most suitable synthesis method according to various factors such as raw material supply, cost considerations, and product quantity requirements.

There are many things to pay attention to in the storage of 4-ethyl ether.
In terms of storage, the first important thing to do is to remove it. It is advisable to reduce the dryness, damage and good ventilation. This is because ether is toxic. If the environment is damp, inflammatory or poor ventilation, it is easy to cause ether to accumulate and increase the risk. Its oxidation, acid, gold and other substances need to be stored in isolation, because the connection of ether is easy to cause intensification and reaction, and it is formed. In addition, the temperature of the room should not be controlled, and it is usually not suitable to exceed 26 ° C, and there needs to be perfect lightning protection and protection to avoid ether explosion due to lightning or damage.
The problem should not be ignored.